Cited by 993Metamaterials and Metasurfaces ApplicationsPhotonic Crystals and ApplicationsAcoustic Wave Phenomena Research

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Dirac cones induced by accidental degeneracy in photonic crystals and zero-refractive-index materials

Huang, Xueqin, Lai, Yun, Hang, Zhi Hong, Zheng, Huihuo, Chan, C. T.·2011·Nature Materials

DOI 10.1038/nmat3030

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Abstract

A zero-refractive-index metamaterial is one in which waves do not experience any spatial phase change, and such a peculiar material has many interesting wave-manipulating properties. These materials can in principle be realized using man-made composites comprising metallic resonators or chiral inclusions, but metallic components have losses that compromise functionality at high frequencies. It would be highly desirable if we could achieve a zero refractive index using dielectrics alone. Here, we show that by employing accidental degeneracy, dielectric photonic crystals can be designed and fabricated that exhibit Dirac cone dispersion at the centre of the Brillouin zone at a finite frequency. In addition to many interesting properties intrinsic to a Dirac cone dispersion, we can use effective medium theory to relate the photonic crystal to a material with effectively zero permittivity and permeability. We then numerically and experimentally demonstrate in the microwave regime that such dielectric photonic crystals with reasonable dielectric constants manipulate waves as if they had near-zero refractive indices at and near the Dirac point frequency.

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Authors: Huang, X., Lai, Y., Hang, Z. H., Zheng, H., & Chan, C. T.
Affiliations: Hong Kong University of Science and Technology (HK)
Corresponding author: Chan, C. T.
ORCID: Huang, Xueqin
Lai, Yun
Hang, Zhi Hong
Zheng, Huihuo
Chan, C. T.
Venue: Nature Materials
Publisher: Springer Science and Business Media LLC
Published: 2011-05-29
Volume: 10
Issue: 8
Pages: 582-586
ISSN: 1476-1122 (ISSN-L)
1476-4660
DOI: 10.1038/nmat3030
OpenAlex: W1964548562
Cited by: 993
References: 30
Citations by year: 2026: 41 · 2025: 63 · 2024: 48 · 2023: 72 · 2022: 62 · 2021: 74 · 2020: 81 · 2019: 89 · 2018: 79 · 2017: 94 · 2016: 89 · 2015: 62 · 2014: 54 · 2013: 38 · 2012: 41
FWCI: 17.62
Type: journal article
Language: en
Open access: closed
Licence: www.springer.com/tdm (tdm)
www.springer.com/tdm (vor)
Locations: Nature Materials (publishedVersion)
PubMed (publishedVersion)
Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
Topics: Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Metamaterials and Metasurfaces Applications
Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Photonic Crystals and Applications
Physical Sciences › Physics and Astronomy › Acoustics and Ultrasonics › Acoustic Wave Phenomena Research
Keywords: Dirac cones, Dirac point, photonic crystals, zero refractive index, zero-index metamaterials, accidental degeneracy, dielectric photonic crystals, effective medium theory, wave manipulation, Brillouin zone

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Dirac cones induced by accidental degeneracy in photonic crystals and zero-refractive-index materials

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